Re: [igraph/igraph] Test suite error on mips64el architecture (#1469)

Hi Debian Mips team,

the package igraph fails on mips64el autobuilder[1] with

    ...
    228: Eigenvector centrality (igraph_eigenvector_centrality): FAILED (arpack.at:59)
    ...

    ERROR: 264 tests were run,
    1 failed unexpectedly.
    2 tests were skipped.
    ## -------------------------- ##
    ## testsuite.log was created. ##
    ## -------------------------- ##
    
    Please send `tests/testsuite.log' and all information you think might help:
    
       To: <[email protected]>
       Subject: [igraph 0.8.3] testsuite: 228 failed
    
    You may investigate any problem if you feel able to do so, in which
    case the test suite provides a good starting point.  Its output may
    be found below `tests/testsuite.dir'.

I tried to track down the issue on eller.debian.org to create the said
tests/testsuite.dir since upstream needs this to investigate.
Unfortunately I was not able to reproduce the issue there but got:

    ...
    228: Eigenvector centrality (igraph_eigenvector_centrality): ok
    ...

    ## ------------- ##
    ## Test results. ##
    ## ------------- ##
    
    263 tests were successful.
    3 tests were skipped.
    make[3]: Leaving directory '/home/tille/igraph-0.8.3+ds/tests'

Any idea why the package builds on eller but not on the autobuilders?

Kind regards, Andreas.

[1] https://buildd.debian.org/status/fetch.php?pkg=igraph&arch=mips64el&ver=0.8.3%2Bds-1&stamp=1601885094&raw=0